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Topographical distribution of the theta-frequency ERD/ERS amplitude for each performance type. The alpha ERD/ERS was mapped at three preshot periods with respect to zero time (i.e., shot release): T1, from -3 s to -2 s; T2, from -2 s to -1 s; and T3 from -1 s to zero time. Color scale: maximum ERD and ERS are coded in red and blue, respectively. The maximal (%) value of the ERD/ERS is given at the top of the maps.
